#5. Mr. Kennedy (Mr. Anderson)
When Ken Anderson, better known as either Mr. Kennedy or Mr. Anderson--first started his WWE run he seemed to have a rocket ship strapped to his back.
He defeated six former world champions in a short time, he won the Money in the Bank contract, and was over with the crowd.
However, three WWE veteran objected to his meteoric rise and sought to stunt his momentum. Randy Orton complained that Kennedy was stiff in the ring, causing real injuries to his opponent. John Cena was quick to add his two cents backing up Orton, and Triple H allegedly never liked Ken Anderson as a person, though he saw worth in his value as a performer.
When Anderson wound up sidelined with injuries in rapid succession, the WWE cut him loose. Given that Orton is still in a prominent role with the company, and Triple H is all but assured to be Vince's heir, Kennedy doesn't have much hope for a return to the WWE.